FM Module B250

This document provides a detailed circuit schematic for the FM Module B250. It includes component specifications, such as resistor values (1/4W, 5%), specific diode models (D664), and transistor specifications for the E7 through E19 series (Texas Instruments SN7404N or Fairchild U6A90095X). The schematic illustrates a transistor and diode conversion matrix with associated inputs and outputs, operating from -15V and -3V power supplies.